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Modeling of the Elastic Plates of Non-Base Configurations for the Cams of Automatic Half-Hose Machines

Berezin Leonid, Savchenko Kyrylo, Rubanka Mykola, Polishchuk Oleh, Oliinyk Olena, Rubanka Alla

Advances in Science and Technology. Research Journal

2021

Vol. 15, no 1

92--98

The purpose of the work was analytical research and computer modeling of the influence of shape and size of console beams of elastic plates in non-base configurations for the cam of the automatic half-hose machine under the conditions of flexibility, strength, and minimization of sizes. The scientific novelty of the work lies in the further development of the theory and methodology of designing the elements of knitting systems of the automatic half-hose machines based on regimes of loading, limitations in strength and dimensions, as well as requirements of the technological process. In order to increase the flexibility of the elastic plate, the symmetrical introduction of two console beams of trapezoidal shape was proposed. The influence exerted by the coefficient of the shape of console beams and their lengths on the magnitudes of deflections and stresses was analyzed, which allows making grounded and flexible decisions regarding the dimensions of the root and the end sections of the beams at the preliminary stage of design. The mathematical support was presented mainly in an explicit form, which simplified the analysis of the influence of controlled dimensions of the elastic plates on their flexibility and strength, as well as contributes to the comprehensive approach to the development of cams of different constructions with elastic plates and allows improving the quality and efficiency of design solutions of cams. The beam bending theory and the finite element method based on Code_Aster shared software were used. The model of the plate was represented by an ordered grid of finite nodal elements of the same size, without the use of elongated and flat elements. According to the results of simulation experiments, the distributions of deformations and stresses on the surface of the elastic plate of the cam were obtained, depending on its shape and size, which confirmed the validity of calculated recommendations.

On a Hybrid Approach for Modeling and FEM Analysis of Body Collision in an Engineering Application

Warzecha M.

Mechanics and Mechanical Engineering

2016

Vol. 20, nr 4

531--552

A methodology for hybrid modeling and FEM analysis of body collision is presented and illustrated by a simpli ed, theoretical example. Each step required to use the presented approach in engineering practice is described and methods of checking the correctness of conducted FEM analysis are given. The in uence of colliding body configuration on the value of maximal collision force is studied and discussed. The results of FEM analysis, using the suggested approach, supported by free software, are presented and their correctness is veri ed by proposed checking methods. Advantages and disadvantages of the proposed approach are also discussed.